Paper-cutting device for printing-presses



(No Model.)

S. A. GRANT. r PAPER UUTTING DEVICE FOR PRINTING PRESSES;

No. 255,616; Patented Mar. 28,1882.

T all whom it may concern 'UNETEE STATES PATENT OFFICE.

SIDNEY A. GRANT, OF MALDEN, MASSACHUSETTS.

PAPER-CUTTING DEVICE FOR PRlNTlNG-PRESSES.

SPECIFICATION forming part of Letters Patent No. 255,616, dated March 23, 11852. Application filed September 2, 1881. (No model.)

Be it known that I, SIDNEY A. GRANT, acitizen of the United States, residing at Malden, in the county of Middlesex and State of Massachusetts,- have invented new and useful Improvements in Paper-Cutting Devices for PrintingPresses, of which the following is a specification.

This invention relates to the details of construction of paper-cutting devices for printingpresses, the object being to provide improved devices to operate with cylinder-presses to cut paper from a roll-strip, and which are adj ustable so that a longer or shorter piece of paper can be out, according to the requirements of the work.

The drawing forming part of this specification illustrates the cylinder of a printing-press to which are applied the said cutting devices constructed according to my invention.

In the drawing, A is the cylinder of a printing-press and D is a portion of the frame of said press.

B is an addition to the frame I) for providing a support for the knife-frame c.

d d are springs secured to frame B, one end of which lies on said frame 0, and their opposite ends are secured to frame B.

c is a knife-frame pivoted between the vertical posts of frame B.

e is a knife pivoted between the two arms of frame 0.

v z z are two rollers=hung upon studs projecting from said arms.

0 0 are springs secured to said arms and having one end lying against the face of knife 6, near its upper edge.

e o are circular cams around cylindcrA, near each end thereof,'and they are adjustably secured thereon by screws 00, and by others (shownin dotted lines) through the thicker part of said cams.

s sare parallel strips adj ustabl y secured upon cylinder A.

n are the usual paper-nippcrs adapted to 0p crate with press-cylinders of this description.

The cylinder A is of the ordinary construc tion used in cylinder printing-presses,and has attached to it in the usual way the nippcrs n. Upon said cylinder, near to each end thereof, are secured the two cams o o. Said cams are sccured upon said cylinder by screws or, and the face of the cylinder under said cams has a series of screw-holes made therein, as shown in dotted lines, to provide for chaugingthc position of the thick portion of said cams relative to the nippcrs n by sliding said cams around the cylinder, or, in other words, by holding said cams while the cylinderis turned to move the nippcrs n nearer to or fartherfrom the ends of said thick portions of the cams, when said screws may be inserted through the cams into the cylinder.

Two parallel strips, 8 s,'which are of sufficient thickness to form a groove between them, as shown, and whose length is that of knife 6, or more, are secured adjustably upon cylinder A, and may be moved thereon to correspond with any change of said cams o, as aforesaid,

as the operative position of said strips is be-- is imparted to said frame as said cams revolve under said rollers.

A knife, 0, is pivoted between the arms of frame a, and two springs, 0 o, are adapted to press against the face of said knifenearits upper edge and hold its lower portion below its pivot-poiut, agaiusta stop-pin, w, set in one of said arms. Two springs, dd, secured to frame B, are adapted to bear upon the top of said arms and compensate for any lack of weight to make said frame and knife operate properly. The operation of my improvements with cylinder A is asfollows: The rotarymovemcnt of said cylinder is in the direction indicated by the arrow thereon. The endot' the paperstrip from the roll is brought to the cylinder and made to lie thereon abouton a line under the edge of knife 0, or in a convenient position for the nippcrs n to catch it as the cylinder revolves. Said nippcrs having thus caught the end of the paper the latter is drawn under knife c, follo wing around the cylinder until roll ers i '5 drop off the ends of cams o, letting knife 6 drop suddenly upon the paper, driving its cutstrip.

ting-edge into the groove between the strips 8 s, and thus severing that part of the paper between nippers n and the strips 8 s from the Said piece of paper which is so cut off is carried around to be printed upon in the usual way, and the nippers n again seize the end of the paper, and the operationis repeated. When knife 0 drops as aforesaid, carrying its lower edge into thegroove between strips 88, the rotarymotion of cylinderA is not arrested, but said knife oscillates upon its bearings in the arms to frame 0, and its cutting-edge is swung slightly by the movement of one of strips 8 against it; but as soon as said strip has passed from under said knife, leaving it free, springs 0 0 act and swing the knife back to the cutting position shown in the drawing, frame 0 meanwhile riding upon cams t v.

By the employment of the above-described improvements paper for-printing with cylinder-presses can be fed thereto automatically from a roll and be cut to variable lengths before being printed upon, thus saving the expense of previously cutting and then feeding the paper sheet by sheet from a table.

Instead of using the separate strips 8 s, so applied to cylinder A as to form a suitable groove between them for the edge of knife 6 to drop into, a single grooved flat strip may be used, made of hard wood, rawhide, or any suitable material which will constitute a proper grooved knife-bed upon which the edge of the knife may drop and sever the paper without injuring its cutting-edge. When said strips are applied as above described some one of the above-named or other suitable material is placed between said strips for the edge ofsaid knife to fall upon, as shown.

WVhat I claim as my invention is 1. The combination, with the printing-press cylinder A, provided with the nippersn, of the adjustable strips 8 s, the adjustable cams v v, the pivoted knife-frame c, and the knife 0, pivoted to oscillate in said frame, substantially as set forth.

2. The combination,in paper-cutting devices for aiming-presses, of the cylinder A, having a grooved knife-bed adjustable to different positions upon its periphery, theoscillatory knife 6, and mechanism, substantially as described, to permit said knife to drop upon said knife-bed and to lift said knife therefrom as said bed passes under said knife, substantially as set forth.

SIDNEY A. GRANT.

Witnesses:

T. H. KEENAN, R. S. GHAsn. 

